Karel NT421 Technical Reference And User's Manual

IP SIP

TELEPHONE SET

TECHNICAL REFERENCE

AND

USER GUIDE

FEBRUARY- 2012

NT42I Technical Reference and User Guide

II

NT42I Technical Reference and User Guide

III

Version Table

Guide Date/Version

AAA/27.02.2012

NT42I Tech. Ref. and User Guide– Ver. AAA – 27.02.2012

KAREL reserves the right to make modifications in product features mentioned in this
document for development and improvement purposes, without prior notice. Individual
products may possess characteristics different from those that have been mentioned in this
document, due to their differences in software and hardware versions.

NT42I Technical Reference and User Guide

IV

ISSUES TO PAY ATTENTION TO

♦ Read this guide carefully before you use your device and keep it for later
reference.

♦ Any mistake with the connections in your device may damage it or your
exchange. Especially the connection to the exchange must be made by the
Authorized Technical Services. The explanations about connections in the User’s
Guide have been intended to give information only.

♦ A connection box comes with your device. The connections must be made as
described in the installation chapter.

♦ In case you need a connection of plug-outlet type, never apply electric plugs
and outlets; use plugs, outlets and connection components that are specific to
telephones.

♦ Do not make any connection other than the extension connection of the
KAREL telephone system.

♦ There is no part that you can repair or maintain in your device; therefore call
the authorized technical service in case of any malfunction.

♦ Keep your device away from direct sunlight.

♦ Do not let any liquid substance spill on your device.

♦ Do the exterior cleaning of your device with a slightly moistened piece of cloth.

♦ Do not apply any chemicals for cleaning.

♦ Please call your authorized dealer in case you would like to change the place

of your device. Use its own packing to carry the device.

♦ Please do not use exterior signal for the test operations or maintenance. Any
signal which is used externally may damage your device.

NT42I Technical Reference and User Guide

V

PREFACE

Chapters in this guide have been prepared in order to give basic information about the NT42I
IP Phones.

- The basic information about features of the phone has been given and the hardware
of the device is described.

- The keys required for basic use of the phone's are mentioned.

- The hardware requirements of the phone are mentioned and the connection details
are given.

- Required and alternative settings on the NT42I Phone Set are described for users.

- In case there is a problem, the information about points that must be considered is
given.

Best Regards,

KAREL

NT42I Technical Reference and User Guide

VI

CONTENTS

TECHNICAL INTRODUCTION ................................................................................................ 1

Basic Specifications of NT42I ............................................................................................... 1

Specifications of NT42I ........................................................................................................ 2

INTRODUCTION ...................................................................................................................... 3

Parts List on Delivery ........................................................................................................... 3

GENERAL APPEARANCE ...................................................................................................... 4

USER INTERFACE .................................................................................................................. 5

USE OF THE TOUCH SCREEN .......................................................................................... 5

NAVIGATION KEYS AND SPECIAL FUNCTION KEYS ...................................................... 5

PHYSICAL CONNECTIONS .................................................................................................... 7

NT42I NETWORK SETTINGS ................................................................................................. 8

NT42I WEB SETTINGS ......................................................................................................... 11

System Information ............................................................................................................ 11

Network Settings ................................................................................................................ 12

SIP Settings ........................................................................................................................ 13

PHOTO FRAME FEATURE ............................................................................................... 15

TROUBLESHOOTING ........................................................................................................... 16

NT42I Technical Reference and User Guide

1

TECHNICAL INTRODUCTION

BASIC SPECIFICATIONS OF NT42I

VoIP
Protocols

• SIP v2.0 (RFC3261)

Call Features

• Call Back – Calling the caller of last incoming call

• Call Blocking – Blocking all incoming calls

• Call Holding – Holding the existing conversation (10 incoming calls

can be put on hold simultaneously.)

• Call Transfer – (Selective Transfer/Direct Transfer)

• Call Forwarding – Forwarding incoming calls

• Automatic Answering

• Emergency Calls

• 3-Party Conference

Display Panel

• Touch-colored screen

• Caller ID

• Display of simultaneous incoming calls

• Date and Time Displayer

Easy to Use

• Programming via WEB

• Installing software, configuration and phonebook over Web/TFTP

• Recall user settings when machine is restarted

• Backuping and re-installing phonebook, configuration and key

programming files. Installing prepared phonebook.

Keys

• 4 navigation keys

• Volume control keys

• Numeric keys

Special Function Keys

Contacts
Call Log
Menu
Message
Redial
Conference
Park
Transfer
Function

Language

• Turkish / English

Dimensions

• Dimensions: 228 x 217 x 147 mm

• Weight: 960 gr.

Temperature

• 5-40°C

Humidity

• 0-%80

NT42I Technical Reference and User Guide

2

SPECIFICATIONS OF NT42I

Codecs

G.711A
G.711U
G.723
G.726 16 Kbps

G.726 24 Kbps
G.726 32 Kbps
G.726 40 Kbps
G.729

G.723 Ratio

5.3 Kbps

6.3 Kbps

LAN Protocols

SIP v2.0
IP/TCP/UDP/RTP/RTCP/ICMP/ARP/RARP/SNTP

• TFTP Server
DHCP/DNS/SNTP Client
HTTP Server
Static/DHCP IP Assignment
NAT transversal

-STUN - NAT

DTMF

• In-Band

• Out-of-Band DTMF (RFC2833)

• SIP Info

Voice Quality

• VAD – Voice Activaty Detection

• AGC – Automatic Gain Control

• AEC– Acoustic ECHO Canceller

• Jitter Buffer

Tones

• Ring tones – 8 different ringtones

• Changeable and installable ringtones

• Warning tone on busy

Power

• 5 VDC adaptor

Phone
Functions

• Message and Call displayer

• Remote SIP registration – Ability to register to 3 different registration

servers. (Sequentially registration or registration to selected
registration server)

• Recorded user settings

• Call Records (128 records are kept for each of Missed, incoming

and outgoing. Last 32 call records are kept for every extension.)

• Full duplex speaker

• 2 internal 10/100 Ethernet switch ports

• Speed Dial / 24 (with DSS module)

• Phonebook – 128 numbers

• Hour/Day/Week/Month/Year basis 8 different periodical alarm,

alarm message or name definitions.

Bluetooth

• Fully Qualified Bluetooth system v2.0 + EDR, CE and FCC

• Integrated chip antenna

• Enhanced Data Rate (EDR) compliant with v2.0.E.2 of specification

for both 2Mbps and 3Mbps modulation modes

• Full Speed Bluetooth Operation with Full Piconet

NT42I Technical Reference and User Guide

3

INTRODUCTION

NT42I is IP based telephone which is perfectly compatible with KAREL’s new generation IP
PBX systems with its superior and advanced properties. NT42I provides cheaper voice
communication with high quality over existing IP lines.

Thanks to NT42I IP Phone’s touch-colored screen is used easily and it is useful in terms of
visuality.

Internet output can be transmitted to computers with another ethernet port of NT42I.

PARTS LIST ON DELIVERY

- NT42I Telephone

- Telephone Handset

- Spiral cable of the handset,

- Ethernet Cable

- AC Power Adaptor

- Product Quality and Warranty Cards

- Technical Reference and User Guide CD

NT42I Telephone Handset

Ethernet Cable AC Power Adaptor Guide CD

NT42I Technical Reference and User Guide

4

GENERAL APPEARANCE

1 HF Speaker 5 Screen Adjustment Plug ** 9 Numerical Key Pad

2 Incoming Call LED* 6 Special Function Keys 10 Voice Control Keys

3 Handset 7 Navigation Keys

4 Screen 8 Special Function Keys

* Incoming Call LED is also used for warning for messages.

** Height of the screen must be adjusted with using this plug.

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5

USER INTERFACE

USE OF THE TOUCH SCREEN

NT42I IP Phone’s touch screen provides that make easily selection or process. Icon what
you want to select that enough touch with fingertip on the screen.

- don’t use sharp tools for scratching

- don’t allow to contact with electric devices

- don’t allow to contact with water the touch screen. Touch screen can be destroyed in
humid situation.

NAVIGATION KEYS AND SPECIAL FUNCTION KEYS

“OK

” key : This key is for user to confirm the setting or activate the function that is

displayed on the screen.

“Navigation

, , , ” keys: These keys help user to move at all menus and choose the

option which user wants.

“Contacts” key: It activates phonebook. It helps user to enter a new number, delete existing
number or reach existing numbers.

“Call Log” key: It activates Call Records Menu. It helps user to reach all call history.

“Menu” key: It helps user to enter or exit the menu that user can adjust all telephone

settings.

“Function” key: It is allocated for future needs. Any function can be assigned to this key as
other programmable keys.

“Message

” key: This key is used for reaching messages. User can understand whether

s/he has got an unlistened message or not.

“Redial” key: Dials again the last called number.

“Conference” key: This key is used for starting a conference while making an external or

internal call.

“Park” key: This key is used for parking the existing call.

“Transfer” key: This key is used for non-announced (without warning other extension who is

going to take the call) or transfer an existing call to an extension with announcement.

NT42I Technical Reference and User Guide

6

Voice Control Keys / Headset Key

According to Headset controls under General Setting menu, the operations of these buttons
are changed. If Headset control is activated, this button is used for activating the headset.
When an incoming call is answered with using this key, the conversation will be made by
using headset and when conversation ends, headset will be inactive.

However if the headphone control is inactive, this key will be used for starting a new call.
During a conversation or stand-by mode or calling mode, this key is used for starting a new
call.

NT42I Technical Reference and User Guide

7

PHYSICAL CONNECTIONS

Connectors, which are connection places of LAN, AC Power Adaptor, Headset, Headset
cables, are placed at the back of NT42I. For fast installation, firstly headset connection has to
be made. Then with making AC Power Adaptor connection, telephone will be started. Finally
LAN connection will be made with an ethernet cable.

NT42I, which is connected to LAN, will not work because NT42I has not got an IP address by
default. All information about adjusting IP settings or registering an IP system is explained in
the related chapters of this guide. Please make programming after checking to those
chapters.

NT42I Technical Reference and User Guide

8

NT42I NETWORK SETTINGS

After making required installations, when telephone is powered on.

Menu can be entered / reached with touch to the icon on the screen or with using display
keys, user can enter menu, other sub menus. After entering Menu, following 10 main menus
will be seen:

- Phonebook

- Call Records

- Messages

- System Settings

- Settings

- Security Settings

- Alarm

- SIP Settings

- DSS Settings

- PBX Settings

An IP address should be assigned to NT42I
because of not having an IP address by default. This operation will be made from
Menu>Settings>Telephone Settings>Network Settings menu.

Enter “Settings” menu by using navigation keys.

After entering Settings menu with pressing “Select” key, enter “Telephone Settings” menu
again with “Select” key.

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Menus, which will help user to assign IP address to NT42I, are at “Network Settings” under
“Telephone Settings” menu.

After entering “Network Settings” menu, an IP address should be assigned to NT42I with
using existing LAN information. While assigning an IP address to NT42I, please contact to IT
service of your company to avoid IP conflict.

To activate NT42I telephone set, firstly;

- IP Type

- IP Address

- Netmask

- Gateway definitions must be done.

There are two options for IP type:

Static IP: User can adjust IP address and Subnet Mask manually.

DHCP: DHCP server makes all necessary network adjustments automatically.

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Select IP type ad Static and then press Confirm.

After selecting IP type as Static, then make the adjustments listed below:

IP Address

Netmask

Gateway

Please ask your company’s authorized person about IP settings that are made.

After entering IP address, Netmask and Gateway addresses, press “confirm“ to save these
addresses. Press “Back” to exit from menu. Before exiting from “Network Settings” menu,
“Save Changes” will be seen at the screen.

Press “Yes” to save the changes and a message will occur to inform user that the changes
are saved.

Other adjustments can be made easily by using special web interface for NT42I.

Adjusting other settings with using web interface will be told at the rest of user guide.

NT42I Technical Reference and User Guide

11

NT42I WEB SETTINGS

Enter IP address of NT42I to one of your computer’s web browser. Be sure that your
computer is connected to LAN. Press “Enter”.

For example, the IP address of this NT42I is 192.168.178.247. Then the page below is going
to be seen.

Enter default password (123456) to the box which is shown above, and then press “OK”.
(Default entry password can be changed from System Settings > Http Password.

SYSTEM INFORMATION

System Information can be seen from this page.

NT42I Technical Reference and User Guide

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NETWORK SETTINGS

By clicking on Network Settings, user can check or change settings which are made
manually.

DNS setting should be adjusted by asking authorized persons.

NT42I telephone set can register to 3 different servers but not at the same time. Defined
servers can be activated whenever user wants.

Entries about server or IP PBX are made from SIP Settings menu.

NT42I Technical Reference and User Guide

13

SIP SETTINGS

NT42I Technical Reference and User Guide

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SIP Register

This option must be “Enable” to make conversations over SIP server or IP PBX. When user
registered to server, s/he can make connections with analog and digital extensions and use
services that server supports.

If this option is selected as “Disable”, user of NT42I can only make IP – IP conversations.

SIP Register Choice

User can choose to select SIP server automatically or manually. If it is selected as
“automatic”, telephone will try to register one of these SIP servers. If it is selected as
“manual”, telephone will try to register one of SIP server which is chosen by user.

Server Choice

The SIP server, which user wants to activate, is chosen from this part. User should mark SIP
server which s/he wants to use.

X.Server IP

This part is used for defining 3 different SIP servers or IP PBX’s or URL.

X.Server Port

This part is used for entering port number of SIP Server. Default value is 5060.

User ID

This part is used for entering user’s account information.

Service ID

This part is used for entering SIP Service ID.

Password

This part is used for entering SIP Password.

User Name

This part is used for entering the name which will be shown at the LCD screen of NT42I
telephone set.

SIP Port

This part is used for entering the port number which telephone will use for SIP
communications. This number may be between 1024 and 65535. Default value is 5060.

RTP Port

This is used for sending and receiving RTP. This number may be between 1024 and 65535.
Default value is 4000.

Register End

At this part the value of time is selected. This time shows the intervals (in seconds) to send
“Register”

to SIP Server. Minimum is 10 sec. and maximum is 65535 sec. Default value is 60

sec.

Keep Alive

“Keep alive” shows the time that in how many seconds telephone will send empty UDP to
SIP server again. Default value is 20 seconds.

DTMF Mode

This part is used for defining the way how DTMF digits will be sent. There are 3 different way
to send DTMF.

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- Inband

- RFC2833

- SIP Info

NAT /NAT IP

This is used to enable or disable NAT device.

STUN Server

At the beginning, entering STUN server’s IP address or entries about server will be enough.
After making all adjustments, click on “Save” to activate the changes.

STUN Port

This part is used for entering port number parameter of STUN. This number may be between
1 and 65535. Default value is 3478.

After making all adjustments about NT42I telephone set, IP user information should be
defined on server. This is obligatory and must not be forgotten.

If server can not get user information correctly, NT42I will send REGISTER message to
server in regular intervals. If server can not identify user, NT42I shows “Registration Failure”
on the screen.

If telephone registers to the server normally, telephone can communicate with predefined
analog and digital telephones and use all services that server supports.

PHOTO FRAME FEATURE

NT42I IP Telephone’s screen has digital photo frame feature. Firstly connecting with IP
address to web page and come to the photo frame on the left menu. And then what photo
you want to see on the phone’s screen as screen saver, can upload.

NT42I Technical Reference and User Guide

16

TROUBLESHOOTING

Telephone does not work even power connection is made.

Be sure that adapter cable is connected to plug. Check that there is voltage at the plug and
be sure that there is voltage at the plug. If every connection is OK, wait 25-30 seconds.
Telephone will start. If telephone is still closed, take the adapter cable back from the plug and
contact with service.

Physical Connections are OK but can not connect to WEB interface.

Check physical connections of your telephone. Check the place of LAN connection at the
telephone is correct. Be sure that Ethernet cable is OK. Check whether IP configuration of
the telephone is correct. Check whether the same IP is used by other machine at the same
LAN or not. If yes, contact to authorized person. Check whether Gateway address is entered
correctly. Ping to telephone’s IP from other computer at that LAN. (by using Command
Prompt and write C:\ ping 192.168.178.247.) If you get response, you can open web
interface, if not please check network settings and check whether they are the same with
NT42I or not. If problem is not solved, please contact with service.

If “Registration Failure” appears.

Check whether telephone LAN cable is connected or not and check whether cable is OK. If
problem continues, please check SIP Settings again. Be sure about SIP server IP and IP
PBX settings. Verify your server username and password. If problem is not solved, please
contact with service.

If telephone is ON but “No service” message occurs.

Be sure that the software of telephone is installed completely. For this purpose, check
System Settings>System Information. Be sure that all cable connections are made
completely. Check Network Settings again. If problem is not solved, please contact with
service.